Thanks Al for picking up the ball......
I headed out last night to meet up with some other car guys and then the
pub
Josh
************************************
Josh Colombo
Josh@surrealmirage.com <mailto:
Josh@surrealmirage.com>
"Life, an ever-changing melody
of beats and rhythm" - ME
************************************
-----Original Message-----
From: milehial2000 [mailto:
acroxford@hypermall.net]
Sent: Saturday, May 11, 2002 11:18 PM
To:
BC-BFLegacyWorks@yahoogroups.com
Subject: [BC-BFLegacyWorks] Re: 93 legacy
Hi Carl, Josh may have given up on us this evenimg. The term
detonation covers several things and they are also called ping, knock
ect. and it can happen for different reasons a small bit of burning
carbon left from a previous burn sometimes will just cause a small
preignition or backfire and probably do no harm a preignition from a
hot charge or high boost can cause damage at times, usually to a
piston and the last is when the charge is ignited just from heat and
pressure and the plug also ignites the top part of the charge and the
two flame fronts from top and bottom collide, this is the worst one
and can cause very high pressures in the chamber and can cause some
damage. But fortunatly most of the time our knock sensors can detect
this and retard the timing and protect the engine before things get
out of hand and this type of damage s fairly rare.
AL(CO)
--- In BC-BFLegacyWorks@y..., Carl Andersen <cdanders@t...> wrote:
> Thanks Josh,
>
> Is this normally a catastrophic problem creating massive oil slicks
and
> holes in the block? Or is it a backfire type situation?
>
> I guess the question is: is there any warning or do you only get one
> detonation per engine rebuild?
>
> Thanks again,
> Carl
>
> Josh Colombo wrote:
>
> > Not that Sam is incorrect
> >
> >
> >
> > Here's a little more in depth definition.
> >
> >
> >
> > Detonation is a cause of pre-ignition. In a high boost turbo
case,
> > what happens is the air intake charge pressures become too high
and
> > too hot, and as the cylinder is compressing the air.....it ignites
> > before it's supposed to.
> >
> >
> >
> > If your spark plug is supposed to fire 20 degrees before top dead
> > center to ignite the mix, and the intake charge is too hot and too
> > much pressure before that, the mix will ignite by
itself....without
> > the spark plug....hence pre-ignition.
> >
> >
> >
> > As a result of pre-ignition, you have an explosion that is going
> > against what the rest of the engine is doing....and it's normal
> > rotation.......and you get detonation......and as Sam put
> > it.....BOOM.....and you could also get a thud and smash as
well......
> >
> >
> >
> > Josh
> >
> >
> >
> > ************************************
> >
> > Josh Colombo
> >
> > Josh@s... <mailto:Josh@s...>
> >
> >
> >
> > "Life, an ever-changing melody
> >
> > of beats and rhythm" - ME
> >
> > ************************************
> >
> > -----Original Message-----
> > From: Carl Andersen [mailto:cdanders@t...]
> > Sent: Saturday, May 11, 2002 5:55 PM
> > To: BC-BFLegacyWorks@y...
> > Subject: Re: [BC-BFLegacyWorks] Re: 93 legacy
> >
> > Can someone give me a deffinition of "detonation?"
> >
> > Thanks,
> > Carl
> >
> >
> > milehial2000 wrote:
> >
> >> You can get quite a bit but the problem is when you get above
> >> about 15
> >> lbs the discharge temp goes through the roof and detonation
is
> >> certain. I am running 15 lbs with a cold air intake and water
to air
> >> intercooler and I think I am probably close to the practical
limit.
> >> AL(CO)
> >>
> >>
> >>
> >> --- In BC-BFLegacyWorks@y <mailto:BC-BFLegacyWorks@y> ...,
Carl
> >> Andersen <cdanders@t...> <mailto:cdanders@t...> wrote:
> >> > Hey all,
> >> >
> >> > What is the highest boost anyone has achieved using the
stock
> >> turbo?
> >> >
> >> > Thanks,
> >> > Carl
> >> > 93 Touring Wagon
> >> >
> >> >
> >> > jason grahn wrote:
> >> >
> >> > >That guy should have one anyway, especially if he's going
to
> >> install a boost
> >> > >controller.
> >> > >
> >> > >I have two I'm selling, one Apexi and one GReddy. email me
off
> >> list
> >> if this
> >> > >guy needs one.
> >> > >
> >> > >-Jason
> >> > >
> >> > >>From: Carl Andersen <cdanders@t...>
<mailto:cdanders@t...>
> >> > >>
> >> > >
> >> > >>If a guy were to install a HBC would he need a boost
guage?
> >> > >>
> >> > >
> >> >
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